#183A6D#183A6D

#183A6D is a dark, moderate blue. Relative luminance 0.043; OKLCH L 35.3% C 0.097 H 258.5°. Best body text is #FFFFFF at 11.26:1 contrast (WCAG AA passes).

Color values

HEX	#183A6D
RGB	rgb(24, 58, 109)
HSL	hsl(216, 64%, 26%)
HSV	hsv(216, 78%, 43%)
CMYK	cmyk(78%, 46.8%, 0%, 57.3%)
CIE-LAB	lab(24.71, 7.36, -33.22)
CIE-LCH	lch(24.71, 34.03, 282.50°)
OKLab	oklab(35.32% -0.0193 -0.0951)
OKLCH	oklch(35.32% 0.097 258.5)
XYZ	xyz(4.6491, 4.3239, 15.0546)
Luminance	0.0432 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183A6D #6D4B18

analogous

#18646D #183A6D #20186D

triadic

#183A6D #6D183A #3A6D18

tetradic

#183A6D #6D1864 #6D4B18 #186D20

square

#183A6D #6D1864 #6D4B18 #186D20

split-complementary

#183A6D #6D2018 #646D18

monochromatic

#060D19 #0D1F3B #183A6D #23559F #2E6FD1

Accessibility & contrast

On white

11.26

#183A6D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#183A6D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183A6D

11.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183A6D	#FFFFFF	#000000	##FFFFFF
##183A6D	1.00	11.26	1.86	11.26
#FFFFFF	11.26	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#203F6F

Deuteranopia (green-blind)

#0F376C

Tritanopia (blue-blind)

#00464E

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #183a6d;
/* rgb */ color: rgb(24, 58, 109);
/* oklch */ color: oklch(35.3% 0.097 258.5);

Tailwind

colors: {
  custom: {
    50: '#626f97',
    500: '#183a6d',
    950: '#000000',
  },
}

SCSS

$custom: #183a6d;
$custom-light: #626f97;
$custom-dark: #000000;

JSON

{
  "hex": "#183a6d",
  "rgb": {
    "r": 24,
    "g": 58,
    "b": 109
  },
  "hsl": {
    "h": 216,
    "s": 63.91,
    "l": 26.078
  },
  "oklch": {
    "l": 0.35318,
    "c": 0.09708,
    "h": 258.5
  },
  "luminance": 0.04324
}

Semantic roles & 50–950 ramp

primary

#183A6D

secondary

#A37A3E

accent

#A541E7

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070D

muted

#7A7A7E

Preview Lab

Preview with #183A6D

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →